Table 4– Effects of low birthweight (LBW)# and sex- and age-specified z-score of childhood body mass index on respiratory outcomes
Written questionnaireVideo questionnaire
Ever wheeze
 LBW0.97 (0.84–1.11)1.02 (0.86–1.20)
 Not LBW1.07** (1.04–1.10)1.10** (1.06– 1.13)
Current wheeze
 LBW1.13 (0.85–1.51)1.04 (0.71–1.53)
 Not LBW1.06* (1.01–1.11)1.07* (1.00–1.14)
Night wheeze
 LBW1.01 (0.68–1.50)0.96 (0.76–1.20)
 Not LBW1.01 (0.95–1.08)1.06* (1.01–1.10)
Severe wheeze
 LBW0.72 (0.43–1.22)0.85 (0.71–1.02)
 Not LBW1.04 (0.96–1.13)1.09** (1.05–1.12)
Wheeze with exercise
 LBW1.05 (0.91–1.21)1.13* (1.01–1.27)
 Not LBW1.16** (1.13–1.19)1.17** (1.14–1.19)
Asthma
 LBW0.96 (0.81–1.15)
 Not LBW1.02 (0.99–1.06)
Night cough
 LBW1.12* (1.00–1.26)1.13 (0.96–1.33)
 Not LBW1.08** (1.05–1.10)1.14** (1.10–1.18)
  • Data are presented as OR (95% CI). #: birthweight <2,500 g. All models were adjusted for parental education level, number of smokers at home, incense burning, active smoking, alcohol use and history of rhinitis and eczema. *: p<0.05; **: p<0.01.